int sd_bus_track_count_sender(sd_bus_track *track, sd_bus_message *m);
int sd_bus_track_count_name(sd_bus_track *track, const char *name);
int sd_bus_track_count_sender(sd_bus_track *track, sd_bus_message *m);
int sd_bus_track_count_name(sd_bus_track *track, const char *name);